29997928349389 has 16 divisors (see below), whose sum is σ = 40276938764160. Its totient is φ = 21576931479360.

The previous prime is 29997928349381. The next prime is 29997928349393. The reversal of 29997928349389 is 98394382979992.

It is a cyclic number.

It is not a de Polignac number, because 29997928349389 - 2³ = 29997928349381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (91).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997928349381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14983979194 + ... + 14983981195.

It is an arithmetic number, because the mean of its divisors is an integer number (2517308672760).

Almost surely, 2^{29997928349389} is an apocalyptic number.

It is an amenable number.

29997928349389 is a deficient number, since it is larger than the sum of its proper divisors (10279010414771).

29997928349389 is a wasteful number, since it uses less digits than its factorization.

29997928349389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29967960420.

The product of its digits is 34284321792, while the sum is 91.

The spelling of 29997928349389 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred twenty-eight million, three hundred forty-nine thousand, three hundred eighty-nine".